(3R,4S)-4-氨基-3-甲氧基哌啶-1-羧酸叔丁酯 、 5-ethyl-4-methyl-1H-imidazole-2-carboxylic acid 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 在
4-二甲氨基吡啶 作用下,
以to obtain 0.43 g of the title compound as a white foamy substance (70%)的产率得到tert-butyl cis-(+/-)-4-{[(5-ethyl-4-methyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidine-1-carboxylate